Zion National Park

Zion National Park is a geologic wonder, even by Utah's lofty standards. Part of the Grand Staircase rock formation that runs from Grand Canyon to Bryce Canyon, Zion's white sandstone cliffs stand on their own. Hikers from around the United States and the world flock to Zion every year to reach the top of towering Angel’s Landing and wade through the depths of the Narrows, both among the best hikes in Zion. Backpacking in Zion is also popular, and an especially good way to escape the park's often overwhelming crowds.Beyond the busy trailheads lay miles of wild backcountry, replete with mesas, slot canyons and arches.

For more than 100 years, our national parks have provided life-list experiences, adventures, and stop-in-your-tracks views. But not all parks—or hikes—are equal. Start with these 25 trips, the new classics of the system.